[jira] [Created] (AMBARI-11266) Blueprint API: Move host_count and host_predicate fields up one level

["John Speidel (JIRA)" <ji...@apache.org>]

John Speidel created AMBARI-11266:
-------------------------------------

             Summary: Blueprint API: Move host_count and host_predicate fields up one level
                 Key: AMBARI-11266
                 URL: https://issues.apache.org/jira/browse/AMBARI-11266
             Project: Ambari
          Issue Type: Task
          Components: blueprints
    Affects Versions: 2.1.0
            Reporter: John Speidel
            Assignee: John Speidel
             Fix For: 2.1.0


Recently, during 2.1 development, API additions were made that allow a host count and host predicate to be specified for blueprint provision and scaling requests.  

The additions are documented in the Apache Jira: https://issues.apache.org/jira/browse/AMBARI-10750

After some consideration and discussion, it has become clear that the host_count and host_predicate fields need to move up one level form their current location under hosts.  Only explicitly specified hosts will be contained within "hosts".

For example:
{code}
{
  "blueprint" : "bp1",
  "host_groups" :[
    { 
      "name" : "master",  
      "hosts" : [          
        { 
          "fqdn" : "john2.novalocal"
        }
      ]
    },  
    { 
      "name" : "slave",   
      "host_count" : "5",
      "host_predicate" : "Hosts/cpu_count>1"   
    }
  ]
}
{code}




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